US4807743A - Ware for flat glass preservation - Google Patents
Ware for flat glass preservation Download PDFInfo
- Publication number
- US4807743A US4807743A US07/115,602 US11560287A US4807743A US 4807743 A US4807743 A US 4807743A US 11560287 A US11560287 A US 11560287A US 4807743 A US4807743 A US 4807743A
- Authority
- US
- United States
- Prior art keywords
- glass pieces
- desiccating
- ware
- paper sheets
- glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
- B65G49/05—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
- B65G49/06—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
- B65G49/068—Stacking or destacking devices; Means for preventing damage to stacked sheets, e.g. spaces
- B65G49/069—Means for avoiding damage to stacked plate glass, e.g. by interposing paper or powder spacers in the stack
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
- B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
- B65D81/266—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants
- B65D81/268—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing gases, e.g. oxygen absorbers or desiccants the absorber being enclosed in a small pack, e.g. bag, included in the package
Definitions
- the present invention relates to a ware for preserving a lot of flat glass pieces arranged in strata.
- FIG. 3 As an example of conventional measures for preserving flat glass pieces arranged in strata there is such a ware as designated by reference numeral 20 in FIG. 3.
- a stand 11 made of iron or wood substantially in the form of letter L in side view.
- the glass pieces 12 of lot 13 have interleaving sheets 14 of paper therebetween.
- the lot 13 is enclosed with a wrapper 15 made, for example, of a polyethylene film, with the bottom left uncovered. Glass pieces 12 are thus protected against deposition of suspended dust in air.
- the paper sheets 14 function to impede corrosion of glass, prevent scratches, and damp shocks, safeguarding the glass sheets 12 which otherwise may be broken or cracked by collision therebetween, such as when carried together with the stand 11.
- the lot 13 is subjected to the atmosphere, particularly at the bottom, so that because of moisture in the atmosphere there first develop, at the lower parts of the glass pieces 12, dew condensation on the surfaces thereof and moisture adsorption by paper sheets 14, Hence, the paper sheets 14 are caused by the moisture to adhere to the surfaces of glass pieces 12, with possible chemical reactions promoted therebetween, thus accompanying an augmented physical transition which produces paper stains on the glass surfaces.
- the surfaces of glass pieces 12 are paper-stained with a gradually increasing tendency and have wrinkle patterns of paper sheets 14 transfered thereto so that the glass pieces 12 are made to look less attractive.
- part of the condensed moisture on the lower parts of the glass pieces 12 is evaporated to spread inside the wrapper 15, and part of the evaporated moisture is recondensed on the glass pieces 12 and paper sheets 14, over their entire surfaces including upper parts, incidentally aggregating on the glass surfaces to form droplets which may drip down on the stand 11, where part thereof may be absorbed by paper sheets 14, so that the preservation environment of the glass pieces 12 gradually becomes worse with respect to humidity.
- the present invention has been achieved to effectively solve such a problem of a conventional ware for preservation of flat glass pieces arranged in strata.
- An object of the present invention is to provide a ware for flat glass preservation, in which a plurality of flat glass pieces arranged in strata are possibly kept free from paper stains on the surfaces thereof, and protected from a surface weathering as well, with a maintained quality even in a long custody.
- the present invention provides a ware for preserving a plurality of flat glass pieces arranged in strata, comprising a plurality of paper sheets to be each respectively interleaved between the glass pieces, a desiccating body to be put in contact with the respective paper sheets, and a sealable wrapper for wrapping the glass pieces, paper sheets and desiccant agent in a shielding manner to the atmosphere.
- FIG. 1 is a side view of a ware for flat glass preservation according to a preferred embodiment of the present invention.
- FIG. 2 is a plan view of the preservation ware.
- FIG. 3 is a perspective view of a conventional preservation ware, as described.
- the ware 10 is for preserving a lot 2 consisting of a plurality of rectangular pieces 1 of a flat glass such as a plate glass, arranged in strata with a rectangular parallelopiped configuration as a whole.
- the glass pieces 1 have a corresponding number of sheets 3 of paper as interleaves each respectively put in gaps therebetween.
- the interleaving paper sheets 3 are dimensioned so as to slightly project over the glass pieces 1 at the top side and at least one side thereof.
- the lot 2 of flat glass is wrapped to be sealed at all the six sides thereof with a wrapper 4 made of a sheet-like material.
- the material of wrapper 4 is of a water vapor transmission ratio not exceeding 20 g/m 2 /24-hrs, and may exemplarily be a polyethylene film such as of a thickness of 30, 40, 50 or 60 microns for general use, although such an example is in no way restrictive. For a special application a multi-laminate paper may be preferred as the material. A number of properly cut pieces of such a material are joined up to form the wrapper 4. The joining may be by a thermal impulse heat sealing or such a hot melt system as using a thermoplastic adhesive, or simply by use of an adhesive tape or the like.
- the lot 2 has unshown coverings such as of a corrugated cardboard or textile material put on the top, bottom and sides thereof, as well as pads at the corners, to protect the wrapper 4 which otherwise may be torn when rubbed against the eges of glass pieces 1.
- the wrapper 4 holds therein a number of desiccating bodies 5 (which may be pouches) containing an adequate quantity of a desiccant agent such as a silica gel. All the paper sheets 3 are kept at the marginal parts thereof in contact with any of the desiccating bodies 5 which are disposed on the upside of lot 2 in the figures, where the arranged glass pieces 1 take a standing or vertical position. In case the glass pieces 1 are horizontally laid to be pulled up, such desiccating bodies may be disposed alongside of lot 2 in a similar manner.
- desiccating bodies 5 which may be pouches
- a desiccant agent such as a silica gel
- the necessary quantity of desiccant agent for the lot 2 substantially depends on the total surface area of the glass pieces 1, and is illustratively determined below by calculation under practical conditions:
- the lotted glass pieces 1 are quantified by the surface area at one side of an original flat glass to be measured in terms of "case", i.e., one hundred square feet.
- Case i.e., one hundred square feet.
- One case of flat glass thus has a surface area of approx. 9.3 m 2 at one side, and approx. 18.6 m 2 in total of both sides.
- the desiccant in general has a labelled moisture adsorption capacity specified for an enormous volume of atmosphere.
- the volume of atmosphere to be confined in the sealed wrapper 4 however is very small, so that for a desiccant put therein the adsorbable moisture amount should be by far less than usually observed.
- the desiccant agent (pouched) as the desiccating bodies 5 is now assumed to be a silica gel which can adsorb moisture up to:
- the amount of moisture to be adsorbed by the agent 5 in ware 10 substantially is the sum of the following three:
- the glass pieces 1 when put in the ware 10 have on the surfaces thereof a condensed moisture amount of
- the paper to be used as interleaf always contains moisture, the amount of which is controlled approx. 8.0 wt% (of the paper's own weight) under a normal warehouse condition. It however is desired for the interleaving sheets 3 of paper between glass pieces 1 to have a moisture content of 6.5 wt% as an optimum point to avoid the appearance of electrostatic charges as well as the occurrence of paper stains on the glass pieces 1.
- the paper sheets 3 are dimensioned so as to have a one-side total surface area of 10 m 2 per one case of glass pieces 1. Assuming the basis weight of paper to be 50 g/m 2 , it so follows that the paper sheets 3 should be deprived of moisture by an amount of
- the glass pieces 1 carry thereon residual moisture the amount of which equals to
- the necessary quantity of the agent 5 in ware 10 is:
- the paper used as interleaf 3 may fundamentally be of any type, but is preferably rough on both sides, small of resin content, large of basis weight or weight per unit area, and neutral in terms of pH. It will provide a better effect to leave such paper kept in an environmental conditions where the moisture content is controllable substantially within a range not exceeding 6 wt%, before use.
- the glass 1 will be all the better preserved, if the amount of moisture thereon before preservation is controlled to be still smaller.
- the flat glass may have metal compounds educed thereon if the paper in contact is acid in terms of pH. Such compounds may however be flushed away with water.
- the lotted flat glass pieces 1 with interleaving paper sheets 3 and desiccant agent 5 are all sealed in the wrapper 4 to shield them from the exterior atmosphere.
- the desiccant agent 5 as a whole has the weight thereof determined to be substantially proportional to the total surface area of glass pieces 1 as measured in case, and is (pouched to be) in contact with the marginal parts of paper sheets 3, to adsorb therefrom part of contained moisture in the respective sheets 3 as well as condensed or residual moisture on the surfaces of glass pieces 1.
- Such moisture is transported by a capillary phenomenon through the fibrous tissue of paper. Since the interior of ware 10 is shielded from the exterior atmosphere, the atmosphere sealed therein becomes impotent to provide sufficient moisture for a continued absorption-andrelease action of paper sheets 3.
- the glass pieces 1 are thus effectively kept free from paper stains as well as from surface weathering.
- the ware 10 is permitted to successfully prevent the deterioration in quality of flat glass over a long preservation period.
- the glass naturally is protected against the deposition thereon of suspended dust in the exterior atmosphere, as well.
- the glass pieces 1 will be maintained quality (Rank A1, see Table-1) over a period of 2.5 years or more, with respect to freedom from paper stain. Even in the case of a polyethylene film, they will have a like quality (Rank A1) maintained over six months or more.
- a polyethylene film 50 micron thick was selected as the material of a wrapper 4. Twenty-four pieces of a plate glass were arranged in strata to constitute each block as the lot 2 for ware 10, and as lot 13 for ware 20. The blocks 2, 13 were set for preservation in wares 10, 20, respectively, to start the test.
- the present invention may well be applied to the preservation of various flat glasses such as a plate glass and a sheet glass as well as that of flatware such as a window glass and special glasses.
Abstract
Description
approx. 7 wt% (a)
1.5 g/case (b).
(50 g/m.sup.2)×(10 m.sup.2 /case)×(8.0-6.5)/100=7.5 g/case (c)
1.5 g/case (d)
(b)+(c)+(d)=1.5+7.5+1.5
=10.5 g/case (e).
(e)/(a)=(10.5 g/case)/(7/100)=150 g/case.
TABLE 1 ______________________________________ (Results of Inspection Item 1) Rank Number of ranked glass Number of ranked glass (*1) pieces ofware 10 pieces ofware 20 ______________________________________ A1 22 5A2 2 5 A3 -- 6 B1 -- 6 B2 -- 2 Total 24 24 ______________________________________ (*1) Glass pieces were ranked from A1 down to B2
TABLE 2 ______________________________________ (Results of Inspection Item 2) Visible paper Number of glass Number of glass stains (*2) pieces inware 10 pieces inware 20 ______________________________________ present 2 19 absent 22 5 Total 24 24 ______________________________________ (*2) Glass pieces were separated according to the presence or absence of visible paper stains.
Claims (7)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61257527A JPS63110185A (en) | 1986-10-29 | 1986-10-29 | Moisture-proof structure of glass laminate |
JP61-257527 | 1986-10-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4807743A true US4807743A (en) | 1989-02-28 |
Family
ID=17307531
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/115,602 Expired - Lifetime US4807743A (en) | 1986-10-29 | 1987-10-29 | Ware for flat glass preservation |
Country Status (2)
Country | Link |
---|---|
US (1) | US4807743A (en) |
JP (1) | JPS63110185A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996039343A1 (en) * | 1995-06-05 | 1996-12-12 | Drug Plastics & Glass Company, Inc. | Container for separately holding a material and desiccant |
EP0997408A2 (en) | 1998-08-24 | 2000-05-03 | Gemtron Corporation | A method of manufacturing a stack of spaced lites |
US20070017841A1 (en) * | 2005-07-22 | 2007-01-25 | Corning Incorporated | Restraining dense packaging system for LCD glass sheets |
US10760215B2 (en) * | 2014-03-13 | 2020-09-01 | Tokushu Tokai Paper Co., Ltd. | Glass plate-interleaving paper |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02105878U (en) * | 1989-02-07 | 1990-08-22 | ||
JP2007253065A (en) * | 2006-03-23 | 2007-10-04 | Topcon Corp | White seizure removing method of glass product |
JP2010132532A (en) * | 2008-10-01 | 2010-06-17 | Nippon Electric Glass Co Ltd | Glass roll and method for producing the same |
JP7236264B2 (en) * | 2018-12-14 | 2023-03-09 | 日本板硝子株式会社 | Windshield manufacturing method |
JP2022164261A (en) * | 2021-04-16 | 2022-10-27 | 日本電気硝子株式会社 | Manufacturing method of glass plate packing body, and glass plate packing body |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2524162A (en) * | 1945-02-27 | 1950-10-03 | Chavannes Marc Alfred | Desiccant packaging |
US3063767A (en) * | 1960-08-30 | 1962-11-13 | Gen Refractories Co | Brick package |
US3618755A (en) * | 1970-05-04 | 1971-11-09 | Libbey Owens Ford Co | Unitized package for sheet materials and method for packaging same |
US3657900A (en) * | 1969-08-01 | 1972-04-25 | Ppg Industries Inc | Packaging arrangement for a multiple glazed unit spacer assembly |
US3809223A (en) * | 1971-08-27 | 1974-05-07 | Crown Zellerbach Corp | Protected lumber package and method of making same |
US3928953A (en) * | 1974-03-25 | 1975-12-30 | Ppg Industries Inc | Packaged add-on multiple glazing units and method |
US4492071A (en) * | 1983-09-23 | 1985-01-08 | Ford Motor Company | Method for preparing blocks of glass for shipment |
US4681218A (en) * | 1982-03-15 | 1987-07-21 | Becton, Dickinson And Company | Moisture-controlled glass microscope slide package |
-
1986
- 1986-10-29 JP JP61257527A patent/JPS63110185A/en active Granted
-
1987
- 1987-10-29 US US07/115,602 patent/US4807743A/en not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2524162A (en) * | 1945-02-27 | 1950-10-03 | Chavannes Marc Alfred | Desiccant packaging |
US3063767A (en) * | 1960-08-30 | 1962-11-13 | Gen Refractories Co | Brick package |
US3657900A (en) * | 1969-08-01 | 1972-04-25 | Ppg Industries Inc | Packaging arrangement for a multiple glazed unit spacer assembly |
US3618755A (en) * | 1970-05-04 | 1971-11-09 | Libbey Owens Ford Co | Unitized package for sheet materials and method for packaging same |
US3809223A (en) * | 1971-08-27 | 1974-05-07 | Crown Zellerbach Corp | Protected lumber package and method of making same |
US3928953A (en) * | 1974-03-25 | 1975-12-30 | Ppg Industries Inc | Packaged add-on multiple glazing units and method |
US4681218A (en) * | 1982-03-15 | 1987-07-21 | Becton, Dickinson And Company | Moisture-controlled glass microscope slide package |
US4492071A (en) * | 1983-09-23 | 1985-01-08 | Ford Motor Company | Method for preparing blocks of glass for shipment |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996039343A1 (en) * | 1995-06-05 | 1996-12-12 | Drug Plastics & Glass Company, Inc. | Container for separately holding a material and desiccant |
EP0997408A2 (en) | 1998-08-24 | 2000-05-03 | Gemtron Corporation | A method of manufacturing a stack of spaced lites |
US6220437B1 (en) * | 1998-08-24 | 2001-04-24 | Gemtron Corporation | Stack of spaced sheets |
US20010009229A1 (en) * | 1998-08-24 | 2001-07-26 | Knoy Donald Lee | Method of manufacturing a stack of spaced lites |
US6488804B2 (en) | 1998-08-24 | 2002-12-03 | Gemtron Corporation | Method of manufacturing a stack of spaced lites |
US6652945B2 (en) | 1998-08-24 | 2003-11-25 | Gemtron Corporation | Method of manufacturing a stack of spaced lites |
US6773777B2 (en) | 1998-08-24 | 2004-08-10 | Gemtron Corporation | Method of manufacturing a stack of spaced lites |
US20070017841A1 (en) * | 2005-07-22 | 2007-01-25 | Corning Incorporated | Restraining dense packaging system for LCD glass sheets |
US10760215B2 (en) * | 2014-03-13 | 2020-09-01 | Tokushu Tokai Paper Co., Ltd. | Glass plate-interleaving paper |
Also Published As
Publication number | Publication date |
---|---|
JPH0369789B2 (en) | 1991-11-05 |
JPS63110185A (en) | 1988-05-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NIPPON SHEET GLASS CO., LTD., 4-8, DOSHO-MACHI, HI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:YASUDA, YOSHIMITSU;REEL/FRAME:004831/0083 Effective date: 19871023 Owner name: NIPPON SHEET GLASS CO., LTD.,JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:YASUDA, YOSHIMITSU;REEL/FRAME:004831/0083 Effective date: 19871023 |
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STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
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FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
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FPAY | Fee payment |
Year of fee payment: 4 |
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FPAY | Fee payment |
Year of fee payment: 8 |
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FPAY | Fee payment |
Year of fee payment: 12 |
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FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |